On the performance of scalable video coding for VBR TV channels transport in multiple resolutions and qualities

Authors:
Zlatka K. Avramova;Danny Vleeschauwer;Pedro Debevere;Sabine Wittevrongel;Peter Lambert;Rik Walle;Herwig Bruneel
Affiliations:
SMACS Research Group, TELIN, Faculty of Engineering, Ghent University, Ghent, Belgium 9000;Alcatel-Lucent Bell, Bell Labs, Antwerp, Belgium 2018;Multimedia Lab Research Group, IBBT, Ghent University, Ghent, Belgium 9050;SMACS Research Group, TELIN, Faculty of Engineering, Ghent University, Ghent, Belgium 9000;Multimedia Lab Research Group, IBBT, Ghent University, Ghent, Belgium 9050;Multimedia Lab Research Group, IBBT, Ghent University, Ghent, Belgium 9050;SMACS Research Group, TELIN, Faculty of Engineering, Ghent University, Ghent, Belgium 9000
Venue:
Multimedia Tools and Applications
Year:
2012

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Abstract

Video broadcast operators target a variety of receiving devices of different resolutions and processing capabilities. In such a heterogeneous TV network, the transport resource consumption is likely to increase. In this paper we estimate the required transport capacity for a broadcast TV network taking into account parameters as currently proposed in standardization bodies. We target constant video quality, hence the TV channel has variable bit rate (VBR). We consider a multicast-based transport system where only the required versions of a TV channel are transported; this leads to fluctuation of the consumed transport capacity over time. The main focus in this paper is on the comparison of a simulcast and a scalable video coding (SVC) transport scheme in several realistic examples with different encoding modes, including spatial and/or quality scalability. To estimate the required transport capacity for simulcast and SVC, we use a comprehensive toolkit based on a Gaussian approximation of the capacity demand. In order to obtain realistic input values for our calculation tools, we characterize the fluctuations of the bit rate associated with a TV channel by encoding a representative set of video clips. Based on the considered realistic examples, we explore under what conditions either the simulcast or the SVC transport scheme is more efficient.